Position Sizing: The 1-2% Rule

Concept

Position sizing answers one question before you enter a trade: how much of your capital are you willing to lose if this trade is wrong? It is not the same as “how large a position can I afford.” Many traders focus on notional size or leverage and only later discover that a string of normal losses wiped a disproportionate share of the account. The 1–2% rule is a widely used guideline: on any single trade, risk only 1% to 2% of total trading capital (measured from the equity you are actually trading with—not a number you wish you had).

Why a small percentage? Because losses compound geometrically against you in ways intuition often misses. If you lose 10% of capital, you need roughly 11% on the remaining balance to get back to even. If you lose 50%, you need 100% on what is left. Risking large chunks per trade turns a statistically normal losing streak into a risk-of-ruin event: you may still be “right” often enough in the long run, but one bad sequence ends the game. Capping per-trade risk is how you stay in the arena long enough for edge—if any—to express itself.

The rule applies to risk, not to the distance the market moves. Your dollar risk is determined by where your stop (or invalidation point) sits relative to entry and by position size. If your stop is wide, a fixed 1% risk budget forces a smaller position; if the stop is tight, the same risk budget allows a larger notional position—but the money at risk stays bounded. That is the point: you standardize pain per trade instead of standardizing “contracts” or “coins” regardless of volatility.

To operationalize the rule on XT, start from account equity you treat as your trading bankroll (often spot balance relevant to the strategy, or futures wallet equity if you trade derivatives—be consistent). Define 1% (or 2% if your plan and experience justify the upper bound) of that number as R_max, your maximum loss if the trade hits your predefined stop. Then solve for size: roughly, position size ≈ R_max / (distance from entry to stop, in price terms, per unit)—adjusted for contract multipliers, tick size, and fees in the product you use. Many traders keep a simple spreadsheet or use the exchange’s order and risk tools so they do not invert the formula under stress.

The 1–2% band is a default, not a law of physics. A newer account learning execution might anchor closer to 1%; a very small balance sometimes forces awkward minimums, in which case you either accept smaller absolute risk in dollar terms while keeping the percentage discipline, or you acknowledge that minimum contract sizes make true 1% risk impossible until capital grows—then you prioritize not oversized leverage as a substitute. What you should not do is silently drift to 5%, 10%, or “all in” because you feel conviction. Conviction is not a risk model.

Finally, per-trade risk stacks with frequency. If you run many correlated positions, five trades each risking 2% are not “2% risk” to the portfolio—they are closer to 10% of capital exposed to a single macro shock unless positions are genuinely independent. Position sizing is the first line of defense; portfolio-level caps (covered in later lessons) are the second. For now, make every individual ticket obey a hard 1–2% loss budget measured from your real XT balance, and size so that hitting your stop realizes that budget and no more.

Treat open PnL as unrealized: your sizing baseline should be equity now, not peak equity from last month. After a drawdown, 1% of a smaller number is a smaller dollar risk—which naturally slows recovery in dollar terms but preserves the percentage discipline that kept you alive. Some traders pause raising risk until a new high water mark; that is optional, but never compensate for losses by raising the percentage risk without a written, reviewed plan.

Observe on XT

Open XT and locate the balances or assets view where your spot and (if you use them) futures or margin wallets show available versus total equity. Note which wallet your strategy draws from; that number is the basis for your 1–2% calculation.

In futures or margin interfaces, find where position size, leverage, and liquidation or margin ratio are displayed. Observe how notional exposure can be large while margin is small—this is why you anchor risk to stop distance and size, not to how “small” the margin looks.

Skim the order form for the product you trade: quantity, cost or margin required, and any TP/SL (take-profit / stop-loss) fields. You are mapping UI fields to the inputs you will use when converting R_max into a concrete order.

Practice

1. Pick one wallet (spot or futures) as your risk basis for this exercise and record its total equity in your base currency (or convert mentally using a stable reference).
2. Compute 1% and 2% of that equity; write both as R1 and R2—your maximum loss per trade under conservative and upper-bound guidelines.
3. For a hypothetical trade on a pair you watch, choose an entry and a stop level you would actually respect; measure per-unit risk (entry minus stop for a long, stop minus entry for a short, absolute value).
4. Divide R1 by that per-unit risk to get a maximum position size in units (ignore fees for a first pass; then repeat subtracting a fee buffer if you want precision).
5. Compare that size to minimum order size on XT for the pair. If the math yields a size below the minimum, note that your effective risk is above 1% unless you widen capital, choose a tighter stop (only if valid), or skip the trade.
6. Repeat step 4 using R2 and note the difference—this is the practical gap between “strict” and “maximum acceptable” risk for your plan.

Checkpoint

Q1: The 1–2% rule refers to what, specifically?

• A) The percentage of your account you hope to gain on each winning trade
• B) The maximum percentage of trading capital you should lose on a single trade if your stop is hit
• C) The minimum leverage you must use on futures
• D) The portion of your portfolio that must be held in stablecoins

Correct: B. The rule caps loss at the stop as a fraction of capital, not target profit or leverage.

Q2: If you lose 50% of your account, approximately how much must the remaining balance gain to return to the original size?

• A) 50%
• B) 75%
• C) 100%
• D) 25%

Correct: C. You need to double what is left (100% gain on the post-loss balance) to recover from a 50% drawdown.

Q3: Two trades each risk 2% of capital with stops. If both are highly correlated and a single event could stop both out, portfolio risk is best described as:

• A) 2%, because each trade is only 2%
• B) Roughly additive (closer to 4% of capital) unless you explicitly hedge or diversify
• C) Zero, because diversification always eliminates correlation
• D) Fixed at 1% regardless of how many trades you open

Correct: B. Correlated exposures stack; per-trade rules do not automatically cap combined risk.